ML20054H634

Startup Test Rept Cycle 5

ML20054H634
Person / Time
Site:	Millstone
Issue date:	05/31/1982
From:	NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20054H633	List: B10519, Forwards Startup Test Rept Cycle 5 ML20054H634
References
NUDOCS 8206240280
Download: ML20054H634 (16)

Text

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4 Docket No. 50-336

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Attachment ,

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Unit No. 2 Startup Test Report i

Cycle 5 i

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May 1982 4

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s INDEX

1. Summary

2. Introduction

3. Low Power Physics Testing Results 3.1 Critical Boron Concentrations 3.2 Control Element Assembly Symmetry Checks 3.3 Moderator Temperature Coefficients 3.4 Control Element Assembly Reactivity Worths 3.5 Hot Rod Drops

4. Power Ascension Testing 4.1 Power Peaking, Linear Heat Rate & Incore Tilt 4.2 Boron Measurements" 4.3 Moderator Temperature Coefficients at 96% Power 4.4 Doppler Only Power Coefficient 4.5 RCS Flow at 100% Power 4.6 Power Distrioution

5. References

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1.

SUMMARY

! Low Power Physics Testing & Power Ascension Testing identified no unusual situations or anomolies. All parameters measured were within 1

their acceptance criteria and technical specification limits. Two (2) parameters are noteworthy.

~4 The most positive measured MTC at zero power was +.49 x 10 dhg> / F

~4 while the technical specification limit is +.50 x 10 4jf / F.

This is a typical situation at initial startup conditions given the large boron concentrations required.following refueling.

f Reactor Coolant System Flow was measured at 100% power to be 118.3%

of Design Flow. The minimum safety analysis / technical specification flow is 117.9% of Design Flow. This is a noticable reduction from I .the RfS flow measured at beginning of Cycle 4. This reduction is due to the plugging of ~ 750 steam generator tubes during the 1981/1982' refueling outage.

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2. INTRODUCTION 4

, Millstone 2, Cycle 5 fuel loading was completed on January 22, 1982.

j The attached core map (figure 1) shows the final core geometry.

Subsequent operation / testing milestones were completed as follows:

Initial Criticality March 11, 1982 Low Power Physics Testing Completion March 13, 1982 On Line March 15, 1982 Completion 50% Power Testing March 17, 1982 Completion 96% Power Testing March 22, 1982 Completion 100% Power Testing March 26, 1982 i

Cycle 5 operation is with ~ 2/3 Westinghouse fuel and + 1/3 Comoustion Engineering fuel. The Safety Analysis is supplied by Westinghouse.

3. Low Pcwer Physics Testing Results Low Power Physics Testing is conducted at a power level of < 5 x10 -2

% power to avoid heat addition from the nuclear fuel.

3.1 Critical Boron Concentrations Critical Boron Measurements were taken at 2 Control Element Assembly (CEA) configurations, all rods out (AR0) and with CEA banks 2 thru 7 inserted (See Fig. 2 CEA map).

The Critical Boron Concentration (CBC) measured with CEA group

, 7 at 144 steps was 1293 ppm. Adjusted to all rods out, the CBC

] is 1301 ppm. ie; Measured @ BOL-HZP-AR0 1301 ppm Boron Predicted @ BOL-HZP-ARO 1281 ppm A: 20 ppm t

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4 Acceptance Criteria i 85 ppm Acceptance Criteria Met ? Yes The Critical Baron Concentration (CBC) measured with CEA groups 7 thru 3 inserted and group 2 @ 24 :teps was 939 ppm.

Adjusted to CEA groups 7-2 inserted, the CBC is 935 ppm Boron.

ie; the measured CBC BOL-HZP 2-7CEA 935 ppm Boron predicted CBC @ BOL-HZP-2-7CEA 897 ppm Am 38 ppm f

Acceptance Criteria = 185 ppm Acceptance Criteria Met ? Yes It should be noted that all of the above boron measurements are an average of a number of boron samples.

3.2 Control Element Assembly (CEA) Symmetry Checks Millstone 2 performs rod swaps among all CEA's in a bank of -

CEA's to verify that no serious tilts are present from either a core misloading, CEA problem, or other reactivity anomalies.

Results of the CEA symmetry checks, expressed as the largest deviation (in d of reactivity) of any CEA from the average CEA for that CEA bank are:

!, Bank 1 CEA's .34C Bank 3 CEA's .20?

Bank A CEA's .23c Bank B CEA's .19c I

i l Acceptance Criteria 12.5C Acceptance Criteria Met? Yes l

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3.3 Moderator Temperature Coefficients Moderator Temperature Coefficients are measured at 2 critical CEA configurations, All Rods Out and with CEA banks 2-7 inserted.

The measurement 0 528 F CEA 70 14'; steps & a boron concentrationof1303ppmBaronwas+.48x10'op/F Converting this measurement to its most positive value (CEA-7 All Out) increases the value to +.49 x 10'4y/ F Measured value of MTC 0 528 F BOL-HZP ARO +.49 x 10'4 q/F Technical Specification Requirement <+.50x10'#p/F4 Acceptance Criteria Met? Yes Converting the measurement to the conditions of the prediction gives a value of +.45 x 10 -4 /F MIC measured value at 532 F, AR0, Baron = 1281 ppm +.45 x 10'4y/F 1

MIC Predicted value at 532"F, AR0, Boron = 1281 ppm +.48 x 10'4g/ F

-4 Acceptance Criteria 1.3 x 10 A /"F Acceptance Criteria Met? Yes l

The MTC measurement with CEA banks 7 thru 3 inserted & CEA bank l

2 0 24 steps, temperature = 529 F & a boron concentration of 940 ppm was .41 x 10'4 4 /F l

_- ._ - _ - _ = _ _ -. . _

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Adjusting the measurement to the predicted conditions of 897

-4 ppm Boron & Bank 2 at 0 steps gives a value of .48 x 10 y/F i

Measured value of MTC @ 532 F, CEA 7-2

~4 inserted & Boron = 897 ppm

.48 x 10 4f/F Predicted value of MTC.@ 532 F, CEA 7-2 inserted & Boron = 897 ppm - . 35 x 10

-4 4 f /*F

.13 x 10 -4 of / F i

~4 Acceptance Criteria .3x 10 4{/ F Acceptance Criteria Met? Yes t

3.4 Control Element Assembly Reactivity Worths i

Reactivity worth measurements were performed twice on CEA banks 2 thru 7. The first measurement involved measuring the reactivity worth of each CEA bank individually. The second-measurement involved measuring the reactivity worth of CEA banks 2-7 in their normal overlap mode of operation.

l Results of the measurement were:

Individual Bank Measurements l

l CEA Bank Measurement Prediction Delta  % Difference 7 .478%ap .512 .034 7.1%

6 .386 .416 .03 7.8%

5 .210 .214 .004 1.9%

4 1.079 1.167 .088 8.2%

3 .655 .642 .013 -2.0%

2_ 1.065 1.079 .014 1.3%

TOTAL 4.1%

3.873%4p 4.03%of .157%A f

CEA OVERLAP MEASUREMENTS CEA Bank Measurement Prediction Delta  % Difference 7-4 2.309%AQ .172%of 8.0%

2.137%A{

3 .640 .642 .002 0.3%

2 1.055 1.079 .024 2.3%

TOTAL 3.832%1p 5.2%

4.03%o{ .198%Af Acceptance Criteria on any individual bank either 1.1%A or <15%

error.

Acceptance Criteria Met on all banks? Yes Acceptance Criteria on Total CEA 2-7 Worth; 110%

Acceptance Criteria Met? Yes 3.5 llot Rod Drops Hot Rod Drops were performed on all 61 CEA drive mechanisms.

The drop times from 0 to 90% insertion ranged from 2.02 to 2.31 -

seconds for all CEA's.

Acceptance Criteria: All CEA's most drop from 0 to 90% insertion in-less than 3.1 seconds, per technical specifications.

Acceptance Criteria Met? Yes

4. Power Ascension Testing 4.1 Power Peaking, Linear lleat Rate and Incore Tilt

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l Measurements were:

Power Level Fxyt Frt Max. Linear Heat Rate Incore Tilt 50% 1.580 1.504 6.96 KWS/FT .003 j 96% 1.561 1.491 12.83 .004 100% 1.532 1.492 13.18 .004 Corresponding Technical Specification Limits are:

Power Level Fxyt Frt Max. Linear Heat Rate Incore Tilt 50% 1.776 1.776 15.6 KWS/FT .02-96% 1.664 1.627 15.6 .02 4

100% 1.615 1.63 15.6 .02 Technical Specification Limits Met? Yes 4.2 Boron Measurements

At 50% power, 35 MWD /MT, ARD, Equilibrium Xenon, the measured Boron Concentration was 1030 ppm Boron.

I Measured 50% Power, ARO, Eq Xe, 35 MWD /MT 1030 ppm Boron i

Predicted 50% Power, AR0, Eq Xe, 50 MWD /MT 981 ppm Boron ghs 49 ppm Boron Acceptance Criteria = 185 ppm Boron Acceptance Criteria Met? Yes At 100% power, 400 MWD /MT, ARD, Equilibrium Xenon, the measured Boron Concentration was 900 ppm Boron.

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Measured 100% Power, AR0, Eg Xe 400 MWD /MT 900 ppm Boron Predicted 100% Power, ARO, Eg Xe 400 MWD /MT 885 ppm Boron A* ;15 ppm Boron Acceptance Criteria = 185 ppm Boron Acceptance' Criteria Met? Yes 4.3 Moderator Temperature Coefficient at 96% Power The moderator temperature coefficient was measured at 96% power with CEA 7 at 150 steps, Tave = 566.6 F and Boron = 927 ppm.

The measured MTC was -3.3 PCM/ F.

Adjusting the measured value to the condition of the prediction gives the following.

Measured MTC at 96%, 914 ppm Boron & T = 567.8 F = .36 x 10 -4 ave 9/F Predicted MTC at 96%,-914 ppm boron & T = 567.8 F = .34 x 10~ AP / F ave

.02 x 10 -4y/F

-4 Acceptance Criteria = 1.3 x 10 q/F Acceptance Criteria Met? Yes J.4 Doppler Only Power Coefficient The doppler only power coef ficient was measured at 94.5% power, T

ave

= 570. F and Boron = 927 ppm. The measured value at these conditions was .978 x 10 -4 /% power Adjusting the measured'value to the conditions of the prediction yields:

-4 Measured value at 93% power,

.99 x 10 o{/% power 914 ppm Boron and Tave = 572.5 F

-4 Predicted value at 93% power, .87 x 10 9/% power 914 ppm Boron and Tave = 572.5 F

.12 x 10 -4g/%' power Acceptance Criteria = 1.3 x 10-4  % power Acceptance Criteria? Yes 4.5 RCS Flow @ 100% Power The measured RCS flow at 100% power was 118.3% of Design Flow Acceptance Criteria, RCS Flow >117.9% of Design Flow Acceptance Criteria Met? Yes 4.6 Power Distributions Power Distribution Maps are shown at 50 and 100% power in Figures 3 & 4. The agreement between measurements & predictions is quite good.

Acceptance Criteria: All locations within 10%

Acceptance Criteria Met? Yes

5. References 5.1 Inservice Test T82-1, Low Power Physics Testing Cycle 5 5.2 Inservice Test T82-2, Power Ascension Testing Cycle 5 5.3 Westinghouse Nuclear Design Report - Cy'cle 5 JP:bjo i

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50% Power--80C5 l Predictedo 50% Power, AR0, Eouilibrium Xenon, 50 IND/HT FIGURE 3 -

XXX YYY INCA Measured, 50% Power, CEA-79177 stens, Equilibrium Xenon, 40 MWD /MT . . . , . ..

% Difference ZZZ Relative Power Densities 33 34

.78 .60 t

.79 .611 '

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29 30 31 32 1.00 1.11 .80 .60 1.006 1.099 .815 .617

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.868 1.146 .949

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.966 1.203 .981 1.112 1.027 1.159 17 1.7% .6% 1.1% .7% 1.7% .1% ly698 l

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1.05 1.24 .86 1.16 1.04 1.28 1.02 1.04 1.253 .813 1.145 1.054 1.291 1.034 )  !

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.905 l 3.7%

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.81 .96 .99 .91 1.01 1.22 .92 1.18 .

.795 .915% .993 .878 .998 1.209 .939 1.171  !

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100% Power s BOC 5 I '

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XXX Prediction, 100% Power oAR0, Equilibrium Xenon,150 MWD /MT ,

YYY INCA Measured, 100% Power, AR0, Equilibrium Xenon, 400 MWD /MT . . .. .

ZZZ  %, Difference '

Relative Power Densities  !

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1.05 1.25 .86 1.13 .93 1.068 1.257 .868 1.128 .915 1.71 .56 .93 .18 1.61 18 19 1.22 20 21 22

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.97 1.228 .98 1.12

.990 .66 .991 1.116 1.009 1. H 7 j7 2.06 1.12 1.92 1.15

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1.08 1.26 .88 1.16 1.04 .99 1.084 1.290 .846 1.26 1.160 1.052 1.000 l

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.848 1.08 .916 1.013 1.207 .924 1.127 1.40 3.00 i 2.55 .69 .25 1.54 2.00 -

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